Good idea on the fermentation.
I think it's fun experimenting with different fats in general recipes. I once used duck fat in place of butter in hollandaise, and it was wonderful over poultry. Bacon fat mayo might be good over tomatoes. Kitchen as laboratory!
"Now I'm just another anonymous shut-in with an online shopping addiction." - Georgina Sparks.
"I puked like a hero for the rest of the night." - Anthony Bourdain, 2002.
"Brain: an apparatus with which we think that we think." - Ambrose Bierce
Flavor has a slight porky taste, I think it will work great for the recipe I have in mind.